Description:The future of directly imaged exoplanet characterization studies lies with the next generation of Telescopes. While exciting exoplanet discoveries have been made with current facilities, we have primarily been left with open questions as to the formation, evolution and current state of exoplanet atmospheres. Measuring and understanding the trends within the fundamental properties of exoplanets are at the core of answering these questions. Properties like effective temperature, gravity, mass, radius, and metallicity are key parameters for investigating other worlds. While the transiting and radial velocity planet populations have been investigated via the parameters of their host stars, to date it has been nearly impossible to measure any of these for an exoworld directly from its own data. Major advancements in our understanding have been made not by studying directly imaged exoplanets alone, but by examining their relationship to isolated young brown dwarfs. These substellar objects have parallax measurements along with broad band photometry and spectral coverage from the optical through the mid infrared that has led to breakthroughs in our understanding of cool atmosphere physics. In this talk I will use a population of 152 young brown dwarfs supplemented with outlier populations of extremely cold (Y dwarfs) and low metallicity (subdwarfs)
objects with parallaxes to demonstrate how youth, temperature, and gravity alter the observable properties of this analog population to giant exoplanets. Using a library of spectral energy distributions for the brown dwarf population I will show how we have teased out atmosphere parameters of isolated exoplanet equivalents and started to decipher key observables that could point to formation and evolution differences among objects. (2:00 PM, 726 Broadway, 940, CCPP Seminar)